Aboard the Rachel Carson

Gov. Martin O'Malley joins William C. Dennison (center) of the University of Maryland and Bruce Michael (right) of the natural resources department on the Rachel Carson.

Gov. Martin O'Malley joins William C. Dennison (center) of the University of Maryland and Bruce Michael (right) of the natural resources department on the Rachel Carson. (Baltimore Sun photo by Barbara Haddock Taylor)

Gov. Martin O'Malley joins William C. Dennison (center) of the University of Maryland and Bruce Michael (right) of the natural resources department on the Rachel Carson.Baltimore Sun photo by Barbara Haddock Taylor